Very nice and polished game, the graphics and audio were simple but fit together perfectly. The sound effects kind of reminded me of old Flash games I used to play.
On a side note, an undo button would be nice, but I would guess you didn't have time to code that. I also didn't really like the idea of limited moves, since I like the idea of giving the player as much autonomy as possible to solve the puzzle so the only thing standing in their way is the puzzle itself and not something else like a move counter. But these are just small criticisms, I still enjoyed your game a lot.